Questions tagged [knife-tool]

The Knife Tool cuts new edges into meshes, adding vertices to user-defined points regardless of existing topology. The Knife Project Tool projects the topology of one object onto another, using the current view angle. Use this tag for questions pertaining to the Knife Tool and the Knife Project Tool.

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Can i select “extra edges” in ngon by script or special command in blender?

I have a problem. Maybe somebody can help me. I want select man on plane after knife projection without these "extra edges by script or one command". 1) Can i select "extra edges" in ngon by script ...
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65 views

knife tool 2.8- used in past with no problems

Vertices are not appearing when I drag with the knife tool across the object in edit mode. Am I missing a toggle somewhere? I would include a picture/screenshot but wouldn't really show you anything ...
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42 views

Problem with Intersect (knife) - making extra cuts in mesh

I am trying to make a thread around a cylinder by cutting faces at the intersection. The cut tool makes extra vertices and connects vertices in random places. I also tried using the boolean intersect ...
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Pushing back part of extruded region after using knife tool

Is there an easy way of pushing back the faces on the left part on the screenshot (selected faces) to the place the original faces were extruded from? Result should be like the one the right side. The ...
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54 views

Quad Junctions. Why are some not working the same as identical looking one nearby?

NOTE: as per Moonboots helpful suggestions. Here is the .Blend file for this problem: Hello all I am trying to learn Blender. I've read lots and watched lots of videos and kinda understand the ...
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419 views

Messed up Topology (Shading?) due to the usage of the Knife Project Tool

Dear Blender Stack Exchange Community, After trying to model a sword (after a concept art) I did run into some issues after using the Knife Project Tool. I am trying to add some Screws using the ...
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93 views

Making a hollow cylinder - Blender 2.80

I am trying to recreate the C64 logo in 3D, which roughly looks like this: C= My thought was to create a cylinder the size of the C, then create a second cylinder the size of the inside of the C, lay ...
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53 views

How to fix weird edges when doing knife project?

I am quite new to hard surface modeling but wanted to get into it a little bit. I am doing something like a Porsche 911 back and wanted to cut out the bonnet area. Since I thought Knife project would ...
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43 views

Adding a vertex onto an angled edge in precise X position

I'm designing a part for 3D printing, but I do not know how to cut an angled edge at a precise absolute X position. I marked in red the place where I would like to insert a vertex. It's exactly 2 ...
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36 views

Cut out everything within a volume. Is it possible?

I have a very large model of terrain, spanning several thousand kilometers, with meshes of buildings and trees scattered across it. I'm only interested in one single area of the terrain, and I want to ...
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117 views

Blender 2.8 (Python) - knife project

In Blender/Python 2.8, I am trying to use knife project to cut a circle through a cube. I am attempting to automate a process I can do manually. My code is below; the last line throws this error: ...
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114 views

3D Connexion Space Mouse stops responding during Blender operations

As the question title suggests, I have a minor problem with Blender's implementation of Space mouse/3D mouse control. I finally got the actual operation of the 3D mouse to be like I want. Except ...
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562 views

knife_project in python

I am a blender noob trying to use bpy.ops.mesh.knife_project() in my script. It fails with the message: RuntimeError: Operator bpy.ops.mesh.knife_project.poll() expected a view3d region & ...
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65 views

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons
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68 views

Blender 2.8 carving a circle out of the face of a cube using the knife tool [duplicate]

In Blender 2.8, I am trying to cut a circle out of one face of a cube, but for some reason I can't get it to work. My procedure thus far: (a) Add the cube (add -> mesh -> cube) (b) Add the circle (...
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Beginner Problem with Knife Tool

How can I use the Knife tool to create a line between two vertices? When I try to use it, the tool simply deselects my first vertex.
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29 views

Break up Model and Texture For Unreal Engine 4 Import

I have a large model (.obj file) that was generated by another piece of software and represents a real world location. I also have a very large texture (.jpg file) that was created from images of that ...
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48 views

3D Jigsaw Sphere

I've made a sphere which is UV wrapped with a picture of a world map, and then made hollow by using the 'solidify' modifier. I was wondering if I can break up this hollow sphere into a 3D jigsaw ...
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1answer
43 views

How do you cut a clean hole into an object that has been subdivided?

I can't get it to work using any of the existing answers to this question. I have a box that has been subdivided. I want to cut a square hole into it. I've tried using Knife Project and the Boolean ...
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1answer
192 views

Knife tool with bmesh API

I need to find the intersection curve between two (open) meshes, and I can do that interactively with the knife tool. In search for a way to do it from a script, I came across the following highly ...
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21 views

Knife cut with closed sides like boolean difference does

I am using knife project to cut holes into an object. Is there a way to close the sides of the cut so I cannot see the hollow inside of the remaining part? I created the second picture using boolean ...
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26 views

Making a printable half sphere with a cutout in it for 3D printing

I made a half sphere which prints nicely. The sphere is to be used as a stencil for marking your golf ball. I used the Knife Project to cutout the F. This however created a lot of non-manifolded ...
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122 views

How can I make the knife tool cut in a straight line between two vertices?

If I were to make a sphere and cut between a vertex near the sphere's "north" and a vertex near the sphere's "east," the cut becomes curved in a way reminiscent of the Coriolis effect. I just want the ...
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44 views

Split unjoined mesh into smaller grid based chunks

I have a large blender scene consisting of different objects like streets, trees, walls, roofs, etc. all created from an openstreetmap file imported into blender. I want to split the complete scene ...
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Non-manifold, bad contig Edges and Sharp Edges on simple basic geometry

I have had issues trying to produce clean geometry for 3D printing for what is simple geometry. I check wether my mesh is clean or not using the 3D printing addon. Here is a step by step simple ...
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95 views

How to make a precise bolt hole in a simpler way?

I'm new to blender and using it to create 3d objects for my printer. Part of this is "cutting" holes for bolts very precisely which I managed to do but my way is so long/tedious I must be missing ...
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3k views

Knife project not cutting through

I have a simple rounded edge prism. I created a circle to use as the "knife" because I want to cut 2 holes through the prism. I first select the circle, then select the prism, go into ortho view, ...
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1k views

Slice up terrain mesh into chunks

I have terrain (ANT Landscape plugin) that I would like to cut up into chunks (don't need to be equal size) for a game engine so that I can do occlusion culling / or load and unload chunks around the ...
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24 views

How can i get 256 equal objects from one regular terrain object?

I am trying to do manuel but it is so tiring. I will also show you what i want to do. I think i need to do when object mode but how :(. When 8x8 , it was easy but 16x16 so tired.
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101 views

How to evenly divide a face when loop cut doesn't work

I have a face. It is rectangular, but has extra vertices linking it to surrounding faces. From what I've read, these extra vertices are likely the reason why loop cut (my go to tool for this type of ...
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355 views

Knife tool won't select edges

I've looked everywhere but nobody has this issue, I'm using blender 2.8 and I'm trying to cut a plane model from a top view, but when I press k, select the edge, and then try to cut the inside, it ...
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856 views

Can't use “Knife Project”

I tried to use the "Knife project" tool in order to shape a soda can ring but, even though I selected both the object supposed to cut and the object "to be cut", it only results in the message "No ...
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415 views

Blender 2.8: how to cut non visible edges?

I'm using the knife tool (shift + spacebar + K) to cut a cube. I would like to reach the edges that are behind my current view also. What is the procedure?
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82 views

How do I remove the overlap from merged meshes?

I have recently decided to delve back into 3D modeling, I am a hobbyist I guess you could say. I have been trying to find a solution for this particular problem for days now. I have scoured this as ...
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74 views

Could a knife/carving tool be added to Blender's grease pencil?

https://www.youtube.com/watch?v=ETpas5GnRfc&t=7m56s The above video from 7:56 to 8:10 is the functionality I'm referring to. Instead of erasing and redrawing a line I don't like, or sculpting it, ...
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143k views

Cutting a mesh in half

I have a mesh which I have imported from an OBJ file. I would like to apply Material A to the section of the mesh which is on one side of a given plane, and apply Material B to the section of the mesh ...
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2answers
346 views

What is the best way to model the intersection of multiple hard-surface pieces?

What is the best way to model the intersection of multiple hard-surface objects? Not technically different "objects" persay - but where different pieces meet visually. What are various ways of ...
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24 views

How to Cut Object in Blender? [duplicate]

So basically, I'm trying to cut the selected object through the black line. Also, I only want to keep the inner part. How would I go about doing this?
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230 views

How to delete internal intesected faces?

The following mesh is created by converting a curve with bevel effect like below: The mesh has some faces which extrude into the inside of the shape. This effect can be seen by cutting the mesh into ...
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313 views

Knife tool not working on certain objects

I'm trying to cut some planes using knife tool in edit mode. I'm able to do it to some objects but with other objects I can't click on anything with the knife tool. The red square doesn't appear when ...
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90 views

How can I cut an edge at the mathematical middle?

I have an edge selected and I need to add a new point that is exactly at the middle of that edge. How can I achieve that?
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48k views

How to connect faces between 2 edge loops?

I'm trying to fill empty space in my mesh, and I looked at the knife tool page on the Blender Wiki, and I'm not sure if there's a way to make it so that a new edge is made using the knife tool. I took ...
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1answer
86 views

Slice surface mesh with polygon

I would like to cut a shape out of a surface mesh using a polygon. The "Knife Project" function isn't working for me, as it changes the size of the polygon. When it projects the polygon down onto ...
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2answers
227 views

Knife Tool Limited Cut - Not Cutting All of Mesh/Edges

Currently, I am trying to cut my mesh in half with the knife tool, K. The cutting seems to work at the top and side of the mesh (I pressed enter), but it won't apply at the bottom. Img1 and Img2 ...
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26 views

Using edge-loops/knife tools on character model?

I am doing an example model through a workbook, and I am stuck at a specific section. This section is asking me to add edge-loops to my model (creature figure). I can not get the edge loops to work ...
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2answers
492 views

Cutting multiple objects

How do i cut all these small cylinders in stright line like this?
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91 views

How can I add/cut face into an inside face of a cube?

I'm unable to cut a face into an inside face of a cube as it's not really accessible, can't move the view there. I was trying to zoom in and navigate inside of the cube in order to use a plane to ...
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60 views

How to use knife tool properly?

I am new to blender. Is there a way to make knife tool cut exactly along the axes?
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1answer
404 views

How to cut a mesh outline on another plane

I'm going to be printing a prop gun in two halves and in order to glue it together perfectly, i want to print an outline mold of the gun so both halves can set straight. I tried using the knife ...
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2answers
442 views

Smooth shading of different vertices

I have this mesh: I Bisect it, select one of the parts, and Separate>By Selection. My problem is that because the vertices are not shared, there is a visible seam between the two parts. Is it ...